---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 11/26/16: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 07:59 AM - Just A Few Days Left... (Matt Dralle) 1. 09:36 AM - Audio Isolation Amplifier Boards (nuckollsr) 2. 01:11 PM - Re: Audio Isolation Amplifier Boards (Art Zemon) 3. 01:44 PM - source for nice crimp splices (Charlie England) 4. 02:58 PM - Re: Audio Isolation Amplifier Boards (Charlie England) 5. 06:20 PM - Re: Audio Isolation Amplifier Boards (Sebastien) 6. 07:52 PM - Re: Audio Isolation Amplifier Boards (Jared Yates) ________________________________ Message 0 _____________________________________ Time: 07:59:40 AM PST US From: Matt Dralle Subject: AeroElectric-List: Just A Few Days Left... Dear Listers, There are just a few days left for this year's List Fund Raiser. If you've been putting off making a Contribution until the last minute, well, this is it! The last minute, that is... :-) There are some GREAT new gift selections to choose from this year. I personally want at least three of them! There's probably something you can't live without too! And, best of all it supports your Lists! Please remember that there isn't any sort of commercial advertising on the Lists and the *only* means of keeping these Lists running is through your Contributions during this Fund Raiser. Let's make this a "Black Friday" for the Lists! Please make a Contribution today! http://www.matronics.com/contribution Or, drop a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 Thank you! Matt Dralle Matronics Email List Administrator ________________________________ Message 1 _____________________________________ Time: 09:36:40 AM PST US Subject: AeroElectric-List: Audio Isolation Amplifier Boards From: "nuckollsr" I've had some requests for the bare etched circuit board called out in the DIY amplifier project featured at http://tinyurl.com/hn28p2q Unfortunately, there is a minimum quantity for fabricating these. If I could sell three more boards at $25 each postage paid, I would be wiling to bring another batch of these in house. This was probably the most successful DIY project on the AeroElectric website. I think we sold about 80 of those boards over the years. Bob . . . Read this topic online here: http://forums.matronics.com/viewtopic.php?p=463182#463182 ________________________________ Message 2 _____________________________________ Time: 01:11:23 PM PST US From: Art Zemon Subject: Re: AeroElectric-List: Audio Isolation Amplifier Boards I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique way of asking, do I need one for my plane? -- Art Z. -- https://CheerfulCurmudgeon.com/ *"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel* ________________________________ Message 3 _____________________________________ Time: 01:44:00 PM PST US From: Charlie England Subject: AeroElectric-List: source for nice crimp splices A friend found some of these in a purchased RV-8 project. They seem to be really nice crimps. Very compact, and apparently come in singles, duals, triples, etc. Obviously need a dedicated tool, but for splicing in a bundle, they really reduce bulk. Anyone have any idea where they came from? Charlie ________________________________ Message 4 _____________________________________ Time: 02:58:22 PM PST US Subject: Re: AeroElectric-List: Audio Isolation Amplifier Boards From: Charlie England On 11/26/2016 12:58 PM, Art Zemon wrote: > I'm dim. What is an Audio Isolation Amplifier used for? Which is > oblique way of asking, do I need one for my plane? > > -- Art Z. > > -- > https://CheerfulCurmudgeon.com/ > > /"If I am not for myself, who is for me? And if I am only for myself, > what am I? And if not now, when?" Hillel/ Hi Art, They can have two potential uses. If you open the .pdf file from Bob's link, you'll see multiple sources listed that feed into one destination. This is 'summing' function, that allows combining multiple audio sources while maintaining isolation of the sources from each other. (If you just tie them all together, some or all may not be able to maintain a high enough level and/or have a clean signal. Like tying too many speakers in parallel to your stereo, or worse, tying the left and right outputs together.) With the isolation amp, you hear them all, but they don't interfere with each other. The second potential function (not implemented with the components shown, but possible), is to supply 'gain', or amplification. Some signal sources may not be loud enough to match up with other sources, or you may need more volume in a loud cockpit than your radios or intercom can supply. With a few tweaks to the circuit, it could supply amplification, as well. (Verify with Bob that he's ok with doing this in this particular circuit.) Charlie ________________________________ Message 5 _____________________________________ Time: 06:20:06 PM PST US From: Sebastien Subject: Re: AeroElectric-List: Audio Isolation Amplifier Boards I was wondering the same thing so I had a look at the .pdf. As far as I can t ell it's a budget way of tying in several radios to your intercom without sp ending thousands on an audio panel. Sebastien > On Nov 26, 2016, at 13:58, Art Zemon wrote: > > I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique w ay of asking, do I need one for my plane? > > -- Art Z. > > -- > https://CheerfulCurmudgeon.com/ > > "If I am not for myself, who is for me? And if I am only for myself, what a m I? And if not now, when?" Hillel ________________________________ Message 6 _____________________________________ Time: 07:52:00 PM PST US From: Jared Yates Subject: Re: AeroElectric-List: Audio Isolation Amplifier Boards I use it to consolidate music, vhf nav audio, and dynon audio output into th e single intercom input. > On Nov 26, 2016, at 21:18, Sebastien wrote: > > I was wondering the same thing so I had a look at the .pdf. As far as I ca n tell it's a budget way of tying in several radios to your intercom without spending thousands on an audio panel. > > Sebastien > >> On Nov 26, 2016, at 13:58, Art Zemon wrote: >> >> I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique w ay of asking, do I need one for my plane? >> >> -- Art Z. >> >> -- >> https://CheerfulCurmudgeon.com/ >> >> "If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.